/Engine/Plugins/Experimental/GeometryScripting/Source/GeometryScriptingCore/Public/GeometryScript/MeshNormalsFunctions.h
Get a list of single tangent vectors for each mesh vertex in the TargetMesh, derived from the Tangents Overlays. The Tangents Overlay may store multiple tangents for a single vertex (ie split tangents) In such cases the tangents can either be averaged, or the last tangent seen will be used, depending on the bAverageSplitVertexValues parameter.
static [UDynamicMesh](API\Runtime\GeometryFramework\UDynamicMesh) * GetMeshPerVertexTangents ( [UDynamicMesh](API\Runtime\GeometryFramework\UDynamicMesh) * TargetMesh, [FGeometryScriptVectorList](API\Plugins\GeometryScriptingCore\GeometryScript\FGeometryScriptVectorList) & TangentXList, [FGeometryScriptVectorList](API\Plugins\GeometryScriptingCore\GeometryScript\FGeometryScriptVectorList) & TangentYList, bool & bIsValidTangentSet, bool & bHasVertexIDGaps, bool bAverageSplitVertexValues )